Added scripts, and a few features

Created by: SchrodingersGat

Hi @pointhi I have added some scripts for creating various connectors.

Also I have added a few features / shortcuts, e.g.

Added "addMountingHole" function for added NPTH holes Extended functionality of "createNumberedPadsTHT"

• can provide an x_offset and y_offset for the starting position
• can provide a starting pin number (1 = default)
• can provide a pin-number increment (1 = default)

Let me know what you think. I'm quite liking your script - I had one in the works for exactly the same purpose but yours is much further along so I'm just going to extend yours where I can :)